One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,10,7,11,5,15)(3,12,13,8,4,9,14,16)(17,18)(19,25)(20,22)(21,29)(23,27)(24,28)(26,32)(30,31)(1,3,6,13,7,4,5,14)(2,8,10,9,11,16,15,12)(18,22)(23,31)(24,29)(25,32)(17,19)(18,23)(20,26)(21,30)(22,31)(24,32)(25,29)(27,28) involution — undirected(1,4)(2,9)(3,7)(5,13)(6,14)(8,15)(10,16)(11,12)(19,26)(23,31)(25,32)(27,30) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.